Electric storage heater



FIG. 1 is a front perspective view of the electric storage heater, from one side and above;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a rear elevation view thereof; and

FIG. 6 is a bottom plan view thereof. 

The ornamental design for an electric storage heater, as shown. 